ROM-DB3900 User Manual
6
Table 2.3: COM01A (UART0, 4 WIRE)
Pin
Signal
Pin
Signal
1
TXD485-
2
RXD/
3
TXD/TX
4
RXD485-
5
GND
6
-
7
RTS
8
CTS
9
-
Table 2.4: COM01B (UART1, 4 WIRE)
Pin
Signal
Pin
Signal
1
TXD485-
2
RXD/
3
TXD/
4
RXD485-
5
GND
6
-
7
RTS
8
CTS
9
-